Coupling for harrows.



No. 782,717. PATENTED PER-14, 1905.

G. E. BLAINE.

COUPLING FOR HARROWS.

APPLICATION FILED NOV. 14, 1904.

woento'z m zgymjw UNITED STATES Patented February 14, 1905.

PATENT OEEIcE.

GEORGE E. BLAINE, OF PIQUA, OHIO, ASSIGNOR TO THE BLAINE HARROWMANUFACTURING COMPANY, OF PIQUA, OHIO.

COUPLING FOR HARROWS.

SPECIFICATION forming part of Letters Patent No. '7 82,717, datedFebruary 14, 1905.

Application filed November 14, 1904. Serial No. 232,711. 7

To all whom it bury concern:

Be it known that I, GEORGE E. BLAINE, a citizen of the United States,residing at Piqua,

in the county of Miami and State of Ohio, have invented certain new-anduseful Improvements in Couplings for Harrows; and I do declare thefollowing to be a full, clear, and exact description of the invention,such will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to improvements in barrows, and more particularlyto the means for coupling the transverse tooth-bars of a harrow to thelongitudinal connecting-bars.

The object of my invention is to improve and simplify the constructionand operation of devices of this character, thereby rendering the samemore eflicient and durable in use and less expensive to manufacture.

With the above and other objects in view the invention consists ofcertain novel features of construction, combination, and arrangements ofdevices hereinafter described and claimed.

In the accompanying drawings, Figure l is a detail perspective view ofaseries of transverse tooth-bars of a harrow connected by a longitudinalconnecting bar in accordance with my invention. Fig. 2 is an endelevation of one of the coupling devices, the toothbar being in itsnormal position in full lines and in the position to which it is turnedwhen it is desired to remove it from the coupling in dotted lines. Fig.3 is afront elevation of the parts seen in Fig. 2; and Fig. 4c is adetail perspective view of a portion of one of the tooth-bars, showingthe notches formed therein for the reception of the coupling-collar.

Referring to the drawings by numerals, 1 denotes the longitudinalconnecting-bar of a harrow, to which is connected by means of a seriesof couplings 2 a series of transverselydisposed tooth-carrying bars 3.Each of the couplings 2 is in the form'oi' a casting and consists of acollar 4, formed upon its top with an upwardly-projecting portion or lug5, which is formed with alongitudinal slot or opening 6 to receive thebar 1. Said portion 5 of the coupling is secured upon the bar 1,

preferably by means of a split pin or key 7, which is passed throughalining openings formed in the sides of the lug 5 and the bar 1.

The tooth-bars 3 and the coupling 2, through which the former extend,are of such shape that the tooth-bars can only be passed or slid throughthe collars I when in a certain position, and after they have beeninserted and turned axially the tooth-bars will be locked againstendwise movement in the collars, but will be permitted to have a limitedrotary or axial movement. As shown, the tooth-bar is in the form of aU-shaped channel-iron beam, which has formed in its flanges 8 aliningnotches 9, and the opening in the collar 4 is substantially ellipticalin form, with its major axis disposed npwardlyand rearwardly in anangular direction with respect to a vertical plane. Formed in the collar4 on one of its sides slightly above its center is an inwardlyprojectingportion 10, which is so disposed as to project slightly above theU-shaped toothbar when the latter is in its normal position, as shown bythe full lines in Fig. .2 of the drawings, and thus prevents the samefrom being moved vertically in the collar. In insertin g and removingthe tooth-bar 3 from the collar 4 the former is turned to the positionshown in dotted lines in said Fig. 2, so that its greater dimensionormajor axis alines with that of the opening in the collar. \Vhen in thisposition, the tooth-bar may be readily slipped longitudinally throughsaid collar, and when the notches 9 in the tooth-bar aline with thecollar said tooth-bar may be turned axially to the full-line positionshown in Fig. 2, so that said notches engage said collar and preventendwise movement of the tooth-bar in the same.

Harrow-teeth 11 of any desired form may be secured in the flanges of thetooth-bar 3 in any suitable manner and any suitable means (not shown)may be provided for rotating or adjusting the tooth-bar 3 angularly inthe collar 4c in order to vary the angle of the teeth 11.

The construction, operation, and advantages of my invention will bereadily seen upon reference to the drawings.

The tooth-bar 3 may be readily applied to or removed from the couplingsand when in its normal position will be prevented from moving endwise insaid couplings.

While 1 have shown and described the preferred embodiment of myinvention, it will be understood that I do not wish to be limited to theprecise construction herein set forth, since various changes in theform, proportion, and the minor details of construction may be resortedto without departing from the principle or sacrificing any of theadvantages of this invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. A coupling of the character described comprising a casting consistingof a substantially elliptical collar adapted to receive a notchedharrow-tooth bar, and a projecting portion or lug formed with a slotadapted to receive the longitudinal connecting-bar of a harrow,substantially as described.

2. The combination of a harrow-tooth bar formed with a notch, of acoupling comprising a collar having one of its interior dimensionsgreater than theother, whereby when said tooth-bar is slipped thereinand turned so that its notch engages said collar, endwise movement ofsaid tooth-bar in said coupling will be prevented, and means forattaching said collar to the longitudinal connecting-bar of a harrow,substantially as described.

3. The combination with a harrow-tooth bar, of unequal dimensions incross-section and formed in one of its short faces with a notch, of acoupling comprising an irregularlyshaped collar having major and minoraxes disposed angularly, whereby said tooth-bar will be retained in saidcollar after it has been inserted therein with their major axes inalinement and then turned to cause the notch in said tooth-bar to engagesaid collar, and means for connecting said collar to the longitudinalconnecting-bar of a harrow, substantially as described.

4. The combination of a U-shaped channeliron bar formed with aliningnotches in its flanges, of a coupling comprising a collar having oneaxis or dimension of its opening greater than the other and ofsuflicient size to permit of the insertion of said bar therein, whereby,when said tooth-bar has been thus inserted and turned axially to causeits notches to engage said collar, it will be held against endwisemovement, and means for connecting said collar to the longitudinal barof a harrow, substantially as described.

5. The combination of a U-shaped channeliron bar formed with aliningnotches in its flanges, of a coupling comprising a collar having oneaxis or dimension of its opening greater than the other and of sufiicient size to permit of the insertion of said bar therein, whereby,when said tooth-bar has been thus inserted and turned axially to causeits notches to engage said collar, it will be held against endwisemovement, an inwardly-projecting portion in said collar adapted toprevent upward movement of said tooth-bar in said collar, and a slottedlug upon said collar for the reception of the longitudinalconnecting-bar of a harrow, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

GEORGE F. BLAINE.

\Vitnesses:

J. A. SNYDER, EUGENE J OIINSON.

